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Interaction Benchmarks 09/04/2015 DZIUBA & DASKAYA UBI-COMP WS-2009 TU-BRAUNSCHWEIG 8 After the user selects an item, the application records the selection, updates a small area of the display to look responsive to user operation, and goes back to the waiting/idling state for the next user operation. We define this kind of system activity “Small”. As for “Medium” and “Large” system activities, for example, if a “next” button is pressed to open a new window, the consequent system activity is defined “Medium”, while an “open” button that reads a 1MB file is considered “Large” system activity.

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Conclusion 09/04/2015 DZIUBA & DASKAYA UBI-COMP WS-2009 TU-BRAUNSCHWEIG 13  A methodology based on well-established HCI theory and practices is introduced to make design-time prediction on interactive task energy consumption  The energy efficiency of different user interaction methods on the same task is compared and analyzed. Author show when using different interaction modalities, the energy consumption can vary by a factor of three in achieving the same user goal. Future work is to extend KLEM to other interaction modalities such as speech recognition for input and speech synthesis and speech playback for output.